well, believe it or not I bought 2 45w cfl's from walmart and they work well, as Harddon said, it is not the optimal light, but they work, I used them for 2 small dwarfed plants that did not get enough light during veg and they both flowered and look good, but still small...$8 ea...I would get at least 6 if you want real good light coverage over the entire plant 2-3 up top and 3-4 around the sides...hope this helps...latewood...also you can buy 150 hps from your local electrical supply house $79 , just tell them(if you tell them anything) that you are putting a security pole in your back yard...I also buy my MH and HPS bulbs from them...they don't even give me a look, just don't make up any hokie stories...peace